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Publication of CH1196774A4publicationCriticalpatent/CH1196774A4/xx
G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
G04B1/00—Driving mechanisms
G04B1/10—Driving mechanisms with mainspring
G04B1/22—Compensation of changes in the motive power of the mainspring
G04B1/225—Compensation of changes in the motive power of the mainspring with the aid of an interposed power-accumulator (secondary spring) which is always tensioned
G—PHYSICS
G04—HOROLOGY
G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
G04B19/00—Indicating the time by visual means
G04B19/02—Back-gearing arrangements between gear train and hands